12.5/20/25 mm thick small calibration block for on-site checking of miniature shear wave probe index, time base, beam angle and gain. Includes a 25mm and 50 mm radius, 1.5/5.0 mm hole, engraved reference mark scales from 40 to 75 degrees. In accordance with EN ISO 7963:2010 Cal block No. 2, Fig. 1. • Dimensions: 75mm x 43mm x 12.5/20/25mm • Made of steel of 1018